This circuit generates a two-tone effect very much alike the cuckoo song. It can be used for door-bells or other purposes thanks to a built-in audio amplifier and loudspeaker. Agreeable, very close ...

Which cuckoo clocks are best? Cuckoo clocks are some of the most intricate and beautifully designed clocks there are. Built with hours of care and patience, they are typically hand-carved over months ...